Mike Dolt Enterprises
Mike Dolt Enterprises
User: ceb58, Location: Raeford, NC
Asked on: Wednesday, April 6, 2011 at 7:02 pm EDT
Answered on: Tuesday, May 14, 2024 at 3:53 am EDT
Question: At our communication sites there are taps on the single point underground halo. These taps are then welded to the tower legs, fence post and gates. They are also lugged to A/C units. One is then bonded with the service neutral in the service disconnect. As a rule all of these taps are sleeved in NMFC (car-flex) for looks and protection. We have found that some of the contractors have used LTFMC (Liquid tight) with the metal spiral inside. All they have done is mashed the ends and sealed the ends with duct seal. The conduit stops before the weld and is only about 12" underground. Would this not be a violation of 250.64 (E)?
Yes, this would be a violation of 250.64(E), which requires that the metal raceway be made electrically continuous. The use of liquid-tight flexible conduit (LTFMC) with the metal spiral inside, mashed at the ends and sealed with duct seal, does not provide an electrically continuous path. Flag for review